Harrow



I J. M. GHILDSQI HARROW. No. 378,081. Ratented Feb. 21, 1888.

aywemtoz UNITED STATES P TENT OFFICE.

J. MORRIS CHILDS, OF UTIOA, N YORK.

HAR-ROW. I

SPECIFICATION forming part of Letters Patent No. 378,081. dated February 21, 1888.

Application filed October 22, 1887. Serial No. 253,103. (No model.)

T0 at whom it may concern:

Be it known that I, J. MORRIS Claims, of-

Utica, in the county of Oneida and State of New York, have invented certain new and useful Improvements in Harrows; and I do hereby declare that the following is a full, clear, and exact description-of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.

My invention relates to an improvement in spring curved-tooth harrows; and it consists in the mechanism hereinafter pointed out and claimed.

In the accompanying drawings, Figure 1 represents a crosssection of the frame, clip, and curved spring tooth. Fig. 2 represents a similar view after the tooth has been longitudinally adjusted so as to regulate the depth of the cut. Fig. 3 is a sectional view of Fig. 1 with a clip of modified construction. Fig. 4 is a top view of a portion of the frame and the top view of a clip of modified construction. Fig. 5 is a section of the frame and clip and a section of the tooth. Fig. 6 is a modified construction of clip.

p In constructing harrows with my improvement I provide frames 1, (shown in cross'section,) on which frame I mount a curved springtooth. The'curved base of thetooth is mounted on the seat 5, and is adjustable on the seat for regulating the depth of cut, and may be con-.

sidered as longitudinally adjustable by means of fastening-clip 6, which spans the tooth and engages the curve horizontally only ofl from its bearing on the seat, so that when the tightening-nuts are applied to the clip and the clip firmly engages the tooth its curve springs under the clip, and is thereby gradually straightened and held on the seat under spring tension, thereby preventing the clip and tooth from working loose by shrinkage or wear. Bolts and nuts 7 and 8, or their equivalents, may be used. By loosening the nuts the tooth may be longitudinally adjusted upon its base by moving the same under the clip, and the nuts arethen tightened andthe tooth held to its seat under the spring tension, as before mentioned.

It may here be observed that the bitingedges of the clip, as shown in Figs. 1, 2, and 6, are desirable, as they span the inner curve of the tooth only, and thus allow a greater pressure to be applied to the clip and tooth by the bolts and nuts. I do not, however, intend to limit myself to this peculiar construction, as a clip having a convex surface of less convexity than the curve of the tooth, as shown in Fig. 3, may be used, as it will be observed in this case the horizontal edges onlyof the clip would first hgage the curve of the tooth off its seat and thus hold the tooth under spring tension,as before mentioned. The tooth may be seated on a flat seat on the under side of the frame, as shown in Fig. 5, in which case the clip will engage the tooth on its lower horizontal surface only.

Other modifications of my clip will readily suggest themselves without departing from the spirit of my invention.

What I claim as new, and desire to secure by Letters Patent, is-

1. A harrow-frame having a flat seat, in combination with a spring curved adjustable tooth and a fasteningclip adapted to engage the tooth oif from its bearing on the seat on the horizontal surface of the tooth only, whereby the tooth may be longitudinally adjusted and held when adjusted under spring tension.

2. A harrow-framehaving a fiat seat, in combination with a spring curved adjustable tooth and a'fastening-clip, the ends of which engage the inner-horizontal surface of said tooth only.

In witness whereof I have affixed my signature in presence of two witnesses.

J. MORRIS CHILDS.

Witnesses: V

EDWIN H. RIsLEY, CHAS. A. LONG. 

